Honeywell 1/2" water filter wrench/opener

thingiverse

I had to swap out the home water filter, only to find out I was missing the correct key. That's when I decided to take matters into my own hands and create one from scratch. Using my go-to design software FreeCAD, I brought the key to life on screen. The finished product fits snugly onto the 1/2" filter and has proven itself to be impressively resilient.